[(0,1),(0,2),(2,3),(3,4),(1,5),(5,6),(4,7),(3,8),(1,9),(8,10),(10,11),(2,12),(9,13),(12,14),(5,15),(4,16),(7,16),(9,17),(11,18),(17,19),(14,20),(10,21),(8,22),(7,23),(6,24),(20,25),(17,26),(13,27),(6,28),(11,29),(20,30),(14,31),(12,32),(19,33),(15,34),(16,35),(19,36),(18,37),(18,38),(15,39),(13,40)]
[(0,1),(0,2),(2,3),(1,4),(3,5),(2,6),(4,7),(4,8),(5,9),(8,10),(9,11),(3,12),(11,13),(13,14),(12,15),(14,16),(12,17),(1,18),(11,19),(7,19),(16,20),(20,21),(18,22),(19,23),(9,24),(10,25),(6,26),(18,27),(13,28),(7,29),(15,30),(10,31),(17,32),(16,33),(20,34),(5,35),(17,36),(8,37),(15,38),(14,39),(6,40)]
